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Bus bar module

a bus bar and module technology, applied in the field of bus bar modules, can solve the problems of reducing the sectional area of the bus bar, and achieve the effects of reducing increasing the accuracy of current measurement, and restraining the influence of a magnetic field

Active Publication Date: 2017-01-05
DENSO CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a bus bar module that improves accuracy of current measurement by accurately securing relative positions of a bus bar and a magnetoelectric transducer. The module achieves this by using a substrate to secure the bus bar and transducer in a way that reduces the influence of magnetic fields generated from adjacent bus bars and increases the magnetic flux density. The technical effect of the module is increased accuracy of current measurement. Additionally, the module uses notches on the bus bars to increase magnetic flux density and restrain the influence of magnetic flux from adjacent bus bars.

Problems solved by technology

Further, the notch reduces the sectional area of the bus bar.

Method used

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Embodiment Construction

[0031]A first magnetoelectric transducer measures a magnetic flux (magnetic flux density) generated around a first bus bar due to a current flowing through the first bus bar. A magnitude of the magnetic flux density measured by the first magnetoelectric transducer uniquely corresponds to a magnitude of the current flowing through the first bus bar. Accordingly, the magnitude of the current flowing through the first bus bar is obtained from the magnetic flux density measured by the first magnetoelectric transducer. In order to simplify the description as follows, to obtain the magnitude of the current flowing through the first bus bar from the magnetic flux density measured by the first magnetoelectric transducer may be expressed as “the current of the first bus bar is measured by the first magnetoelectric transducer.”

[0032]The magnetic flux density measured by the first magnetoelectric transducer includes a magnetic flux density caused due to a current flowing through a second bus b...

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Abstract

A bus bar module equipped with a current sensor includes a first bus bar, a second bus bar, a substrate, and a first magnetoelectric transducer. The first bus bar has a first notch. The second bus bar has a second notch and is placed in parallel to the first bus bar. The second notch is provided at a position different from the first notch in an extending direction of the first bus bar. The substrate is fitted to both the first notch and the second notch. Further, the substrate is sandwiched between those side surfaces of the first bus bar and the second bus bar which are opposed to each other. The first magnetoelectric transducer is placed inside the first notch and fixed to the substrate.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a bus bar module including a plurality of bus bars. Particularly, the present invention relates to a bus bar module including a current sensor.[0003]2. Description of Related Art[0004]An electrically-driven vehicle using a heavy-current uses a bus bar module in a power conversion apparatus for outputting electric power to a drive motor. The power conversion apparatus includes an inverter circuit for converting direct-current power of a battery into three-phase alternating current power. Since the power conversion apparatus of the electrically-driven vehicle uses a heavy-current, a bus bar module is used to transmit a three-phase output of the inverter circuit. The bus bar module for transmitting a three-phase output has three bus bars extending in parallel to each other.[0005]The power conversion apparatus often includes a current sensor to monitor a three-phase output current. Since an ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01R15/14G01R15/20H02M1/00
CPCG01R15/148G01R15/207H02M7/003H02M1/0009
Inventor NAKAYAMA, WATARUGOTO, KENJI
Owner DENSO CORP
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